Great question. Building a successful career in the communications arena requires that you speak clearly and eloquently, write compelling copy and exhibit strong interpersonal skills.
The first impression you give is very important, so you whether in writing or in person, you want to be deemed as a credible and honest person. Listening to those you work with and having your finger on the pulse of what's going on around you helps a LOT.
My job varies from day to day, but I definitely write something every day. Some days include video work and other involve managing big employee events such as town halls and health fairs. I try to be organized every day and give 100% of my attention to each and every business partner. It's important to make every partner feel valued and that you are aligned with their goals.
Using intentional collaboration is also a good piece of advice I'd offer. Do not wait for others to seek you out. Raise your hand and volunteer for projects where you can add value. As more and more of us work in dispersed locations and connect virtually, it's important to stay relevant and show people who you are and what you can do.